Ammonium Thiosulfate CAS 7783-18-8
Ammonium Thiosulfate CAS 7783-18-8Ammonium Thiosulfate CAS 7783-18-8

Ammonium Thiosulfate CAS 7783-18-8

Ammonium Thiosulfate CAS 7783-18-8, Ammonium Thiosulfate, CAS 7783-18-8

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Ammonium thiosulfate (CAS 7783-18-8) as a multifunctional chalcogenide.

7783-18-8

H8N2O3S2

148.21

231-982-0

Ammonium Thiosulfate CAS 7783-18-8 Information

CAS 7783-18-8
Molecular formula H8N2O3S2
Molecular weight 148.21
EIENCS 231-982-0
Form Crystalline Powder
Melting point 150°C
boling point /
Density 1.679 g/mL at 25°C
Solubility It is readily soluble in water (with a solubility of 2.15g/100ml at 20℃ and up to 103.3g/100ml at 100℃), slightly soluble in acetone, and insoluble in ethanol and ether.
PKA /
Color White
Storage temp /

Ammonium Thiosulfate CAS 7783-18-8

What is Ammonium Thiosulfate CAS 7783-18-8?

Ammonium thiosulfate (CAS 7783-18-8) as a multifunctional chalcogenide, its core value lies in:


Industrial efficiency: Irreplaceable in the field of electroplating and fixing (the efficiency of dissolving silver halide is 30% higher than that of sodium salts).

Key agricultural intermediates: leading the synthesis of pesticides such as thiazinone;

Safety challenge: It is necessary to strictly prevent moisture and heat (decomposition temperature ≥50℃), and wear a gas mask during operation.


Chemical Name: Ammonium thiosulfate (also known as ammonium sea wave, Ammonium disulfate)

Molecular formula: (NH₄)₂S₂O₃ or H₈N₂O₃S₂

Molecular weight: 148.21 g/mol

CAS Number: 7783-18-8

EINECS number: 231-982-0

Appearance: Colorless to white crystals or crystalline powder, hygroscopic

Solubility

It is highly soluble in water (with a solubility of 2.15g/100ml at 20℃ and up to 103.3g/100ml at 100℃)

Slightly soluble in acetone, insoluble in ethanol and ether


Ammonium Thiosulfate CAS 7783-18-8 Use

1. Photosensitive industry

Photographic fixer: It dissolves silver halides (such as AgBr, AgCl) more efficiently than sodium thiosulfate, shortens the water washing time and has a higher silver recovery rate.


2. Electroplating and metal treatment

Cyanide-free electroplating complexing agent: Forms stable complexes with silver ions ([Ag(S₂O₃)₂]³⁻), enhancing the crystallization density of the coating (dosage: 200-250 g/L).

Metal cleaner: Removes surface oxides and oil stains.


3. Agriculture and Pesticide Synthesis

Pesticide intermediates: Key raw materials for the synthesis of insecticides (thiazinone, zaphidin) and herbicides (fluthiazide).

Soil remediation: Assist plants in the remediation of mercury-contaminated soil (dosage needs to be controlled).


4. Chemical Engineering and Pharmaceuticals

Reducing agent/catalyst: Used in dye synthesis, hydrogen peroxide production and the preparation of organic boron compounds.

Pharmaceutical excipients: bactericides, analytical reagents (such as serum testing).


Ammonium Thiosulfate CAS 7783-18-8 safety

Health risk

Toxicity: Low toxicity (oral LD₅₀ = 2890 mg/kg in rats), but the dust irritates the eyes, respiratory tract and skin.

Decomposition risk: Release of toxic gases (NH₃, H₂S, SO youdaoplaceholder3) above 150 ° C.


Operation and storage requirements

Protective measures: Gas mask, acid and alkali resistant gloves, goggles; Local exhaust system.


Storage conditions

Store in a sealed container in a cool and dry place (≤30℃), filled with nitrogen to prevent oxidation.

Packaging: Woven bags lined with polyethylene bags (25kg per bag)

Leakage treatment: After adsorption by sand and soil, incinerate. Do not use water for flushing (exothermic reaction).


Deshangchemical Info

  • ● Comgpany name : Shandong Deshang Chemicals Co., Ltd.
  • ● Main products : Treatments, sedimentation agents, flame retardants, catalysts, matte pigments, talcum powder, PVC additives, antifreeze agents, cellulose, cleaning agents, coconut oil, hydroxyethyl, cosmetics, matte agents, betaine, disinfectants, photosensitizers, humidifying agents, blue pigments, curing agents, potassium formate, sodium formate, cyclohexanol, preservatives, grinding aids.
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